Automobile-radiator



E. RADLOFF AND H. H. STOKES.

AUTOMOBILE RADIATOR.

APPLlCATlON FILED OCT. 1917.

1,368,197. V Patented Feb. 8,1921

UNITED STATES PATENT OFFICE.

EDWARD RADLOFF AND HENRY STOKES, OF CHICAGO, ILLINOIS,

CHICAGO MANUFACTURING COMPANY. OF CHICAGO, ILLINOIS, A COPARTNERSI-IILCOMPOSED OE EDWARD RADLOFF AND HENRY H. STOKES.

AUTOMOBILE-RADIATOR.

Specification of Letters Patent.

1,368,197. Patented Feb. 8, 19211.

Application filed October 6, 1917. Serial No. 195,016.

To aZZwhom it may concern: her 2. It is common practice to make these Beit known that we, EDWARD RADLOFF and HENRY H. STOKES, citizens of theUnited States, residing at Chicago, county of Cook, State of Illinois,have invented a certain new and useful ImprovementinAutomobile-Radiators, and declare the following to be a full, clear,and exact descrip tion of the same, such as will enable others skilledin the art to which itpertains to make and use the same, reference beinghad tothe accompanying drawings, which form a part of thisspecification.

Our invention has for its object toproduce an automobile radiator ofnovel 'construction whichwill insure a more efficient and rapidradiation of heat than .has here:

tofore been possible and which shall not be subject to injury by thefreezing of Water therein.

, The various features of novelty whereby our invention is characterlzedwill hereinafter be pointed out with particularity in the claim; but,for a full understandingof; our invention and of its objects andadvantages, reference may b had to the following detailed descriptioniaken in connection with the accompanying drawing, wherein:

Figure l is a front view of an automobile radiator arranged inaccordance with a preferred form of the present invention;

Fig. 2 is an enlarged vertical transverse sectional view of a fragmentof the cooling element;

Fig. 3 is a section taken at right anglesto the plane of Fig. 2 at theside of and parallel to one of the tubes;

Fig. 4 is a section taken approximately on line 44 of Fig. 3;

Fig. 5 is a perspective view of one of the radiating vanes or fins; and

Fig. 6 is aside elevation of a fragment of one of the tubes of theradiator having a modified arrangement of vanes or fins.

Referring to the drawing, 1, 2, 3 and 4 represent respectively the topand bottom tanks'or receptacles and side spacing members of any usual orsuitable automobile radiator. The heat interchanging element comprises aseries of upright tubes, 5, hav

ing their ends extending through and soldered into plates, 6 and 7,which cured to and form respectively the bottom of the member land thetop of the memstead of bursting,

- like changing their are 59- tubes cylindrical and surround them withyanes or fins square in outline. This is an inefiicient arrangement andone that is apt to give trouble in cold weather due to the freezing ofthe water in the radiator and so ensuing bursting of the tubes. Thereasonfor the inefliciency is that the distance of the water from thecenter of the cylindrical I,

Inother body of-water in 'each of In accordance with present inven 76tlOIlyWe make the heat interchanger tubes, 5, fiat instead of round,This brings every, portion ofthe water contained 1n he tu bes duiteclosetoa cooling surface. a th 1:-

mora in case water freezes 111, theiradiat r, 80

under pressure and in-. as f the 'cylin'di-ichj tubes do, will assumemore nearly sphericdl for ns so as? to increasefthelr "capacity and thetubes will yield water Each tube is surroundedby ribbonfins or vaneswhose Width islapproximately equal tothe smaller dimension of the tube.Thus a uniform radiating action as obtained in every direction radiallyoffal) each tube and a maximum efliciency results from themetaiemp'loyed Furthermore, in case one or the tubes freezes, thesurrounding vanes or fins yield just as'the tube does,

and without thus being destroyed. If the finsor vanes were made square,even though the tubes were flat, the vanes or fins would burst'under anexpansion of the tubes.

The vanes may conveniently, consist of small washer-like members, 8,each having the material at the center thereof struck up to form curvedears, 9 and 10, at the opposite ends of the long axis of the openingtherein. The members 9 and 10 serve as spacers between successive vanesor fins and, by being curved to fit the contour of the edges of thetubes Wlll. give the finished from the material 70 com pensate for thexpansion of 'the frozen 35 shapes without bursting 95 product theappearance of a simple tube having vanes extending therefrom; no spacersbeing apparent to the eye.

If desired, the vanes or fins may be made in the form of long strips,11, spirally wound about the tubes as illustrated in Fig. 6.

While We have illustrated and described with particularity only a singleform of our invention, with a single modification, we do not desire tobe limited to the exact structural details thus illustratedanddescribed; but intend to cover all forms and arrangements which comewithin the terms employed in the definitions of our inventionconstituting the appended claim,

We claim:

In an automobile radiator, a series of tubes shaped in cross sectionlike long narrow rectangles having the short sides rounded, said tubesbeing so disposed that the flat sides are at'right angles to theplane ofthe front of the radiator, each tube having thereon a series of thinvanes provided with openings conforming to the contour of EDWARDRADLO'FF'. HENRY H. STOKES;

